class_docstr: data dictionary for pushing to tb
      
code: def add_histogram(self, histogram_dict):
      self.datapack[self.HISTOGRAM_NAME].update(histogram_dict)
  
imports: import abc
  import tensorboardX
label_desc: Use image node_id 5 for calling the TensorboardDatapack obj's underlying member method code with example usage: obj.add_histogram(histogram_dict) without return types